This life-size, budget priced lumbar model demonstrates what a herniated disc looks like in relation to the vertebrae and spinal cord. Includes 3 interchangeable discs: normal, central herniation and dorsal herniation. Dissects into 6 parts. Made of durable, flexible plastic. Mounted on a base. Spine model Size: 4-3/4" x 4-3/4" x 5-1/4".